I've looked through the boards and haven't gotten a striaghtforward answer: I'm a noob, I'll probably get a entry dSLR (pentax k100d super or nikon D40) and use the kit lens for awhile and never change it. Will I need to be concerned with weather seals? Taking it into humid environments and mucking up the CCD? If I do ever change the lens, it would be in an enclosed environment (hotel room, etc.) and I'd use a air can (use to blow dust off of computer equipment) and a lens cleaner to aid in the swap. . . I'd like to make an informed decision since I'd consider the k10d just because it has better sealing than the k100d super. . .the price difference is big enough to start a new thread!